net/nfs.h

   1 /*
   2  * (C) Masami Komiya <mkomiya@sonare.it> 2004
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #ifndef __NFS_H__
   8 #define __NFS_H__
   9
  10 #define SUNRPC_PORT     111
  11
  12 #define PROG_PORTMAP    100000
  13 #define PROG_NFS        100003
  14 #define PROG_MOUNT      100005
  15
  16 #define MSG_CALL        0
  17 #define MSG_REPLY       1
  18
  19 #define PORTMAP_GETPORT 3
  20
  21 #define MOUNT_ADDENTRY  1
  22 #define MOUNT_UMOUNTALL 4
  23
  24 #define NFS_LOOKUP      4
  25 #define NFS_READLINK    5
  26 #define NFS_READ        6
  27
  28 #define NFS3PROC_LOOKUP 3
  29
  30 #define NFS_FHSIZE      32
  31 #define NFS3_FHSIZE     64
  32
  33 #define NFSERR_PERM     1
  34 #define NFSERR_NOENT    2
  35 #define NFSERR_ACCES    13
  36 #define NFSERR_ISDIR    21
  37 #define NFSERR_INVAL    22
  38
  39 /* Block size used for NFS read accesses.  A RPC reply packet (including  all
  40  * headers) must fit within a single Ethernet frame to avoid fragmentation.
  41  * However, if CONFIG_IP_DEFRAG is set, the config file may want to use a
  42  * bigger value. In any case, most NFS servers are optimized for a power of 2.
  43  */
  44 #ifdef CONFIG_NFS_READ_SIZE
  45 #define NFS_READ_SIZE CONFIG_NFS_READ_SIZE
  46 #else
  47 #define NFS_READ_SIZE 1024 /* biggest power of two that fits Ether frame */
  48 #endif
  49
  50 /* Values for Accept State flag on RPC answers (See: rfc1831) */
  51 enum rpc_accept_stat {
  52         NFS_RPC_SUCCESS = 0,    /* RPC executed successfully */
  53         NFS_RPC_PROG_UNAVAIL = 1,       /* remote hasn't exported program */
  54         NFS_RPC_PROG_MISMATCH = 2,      /* remote can't support version # */
  55         NFS_RPC_PROC_UNAVAIL = 3,       /* program can't support procedure */
  56         NFS_RPC_GARBAGE_ARGS = 4,       /* procedure can't decode params */
  57         NFS_RPC_SYSTEM_ERR = 5  /* errors like memory allocation failure */
  58 };
  59
  60 struct rpc_t {
  61         union {
  62                 uint8_t data[2048];
  63                 struct {
  64                         uint32_t id;
  65                         uint32_t type;
  66                         uint32_t rpcvers;
  67                         uint32_t prog;
  68                         uint32_t vers;
  69                         uint32_t proc;
  70                         uint32_t data[1];
  71                 } call;
  72                 struct {
  73                         uint32_t id;
  74                         uint32_t type;
  75                         uint32_t rstatus;
  76                         uint32_t verifier;
  77                         uint32_t v2;
  78                         uint32_t astatus;
  79                         uint32_t data[NFS_READ_SIZE / sizeof(uint32_t)];
  80                 } reply;
  81         } u;
  82 };
  83 void nfs_start(void);   /* Begin NFS */
  84
  85
  86 /**********************************************************************/
  87
  88 #endif /* __NFS_H__ */